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HALL-TRIGGER-EVM

Evaluation module for contactless, Hall-effect variable-speed trigger with external field protection

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HALL-TRIGGER-EVM

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Overview

This evaluation module (EVM) uses Hall-effect sensors to implement a trigger that outputs a varying voltage based on how far the trigger is pressed. The EVM uses a contactless approach that reduces wear and tear compared to traditional mechanical-based triggers, thereby improving product lifetime. Low-power Hall-effect switches are used along with a load switch to keep the system in a low power standby mode when the trigger is not pressed. In addition, an optional magnetic field protection feature is available that disables the voltage output when a strong, external magnetic field is present.

Features
  • Up to 10 mm of trigger displacement translated to voltage
  • Measured voltage error <3% without calibration and <0.5% with calibration
  • (Optional) disables voltage output when strong external magnetic fields are detected
  • Operates from AAA batteries or 5-30 V external power supply
  • Low system current consumption in sleep mode (3.5-6.9 µA, depending on selected protection level against external magnetic fields)
Hall-effect latches & switches
DRV5032 — Low power (5 Hz, <1µA), low voltage (up to 5.5V) switch

 

Linear & low-dropout (LDO) regulators
TPS709 — 150-mA, 30-V, ultra-low-IQ, low-dropout voltage regulator with reverse current protection and enable

 

Linear Hall-effect sensors
DRV5056 — Ratiometric unipolar linear hall effect sensor with analog output

 

Load switches
TPS22917 — 5.5-V, 2-A, 80-mΩ , 10-nA leakage load switch adj. rise time and adj output discharge

 

NAND gates
SN74AUP1G00 — Single 1-input, 0.8-V to 3.6-V low power NAND gate SN74HCS00 — 4-ch, 2-input, 2-V to 6-V low power NAND gates with Schmitt-trigger inputs
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Evaluation board

HALL-TRIGGER-EVM — Evaluation module for contactless, Hall-effect variable-speed trigger with external field protection

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Technical documentation

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Type Title Date
* User guide HALL-TRIGGER-EVM User's Guide PDF | HTML 15 Dec 2021
Design guide Contactless, Hall-Effect Variable-Speed Trigger Ref. Des. W/ External Field Prot PDF | HTML 17 Dec 2021
Certificate HALL-TRIGGER-EVM EU RoHS Declaration of Conformity (DoC) 11 Nov 2021

Related design resources

Reference designs

REFERENCE DESIGN
TIDA-060032 — Contactless, Hall-effect variable-speed trigger reference design with external field protection

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